European Technical Approval ETA-09/0105 - ETA-Danmark

ETA-Danmark A/S
Kollegievej 6
DK-2920 Charlottenlund
Tel. +45 72 24 59 00
Fax +45 72 24 59 04
Internet www.etadanmark.dk
Authorised and notified according to
Article 10 of the Council Directive
89/106/EEC of 21 December 1988 on
the approximation of laws, regulations
and administrative provisions of
Member States relating to construction
products
European Technical Approval ETA-09/0105
MEMBER OF EOTA
This ETA replaces the previous ETA with the same number and validity from 2009-05-29 to 2014-05-29
Trade name:
Holder of approval:
Generic type and use of construction
product:
Valid from:
to:
Manufacturing plant:
This European Technical
Approval contains:
Gutzeit concealed beam hangers 90, 120 160, 200
and 240
Gutzeit Verbindungssysteme GmbH & Co.
Rudolf-Diesel-Strasse 1
D-58730 Fröndenberg, Industriegebiet
Tel. +49 2373 - 979261
Fax +49 2373 - 979266
Internet www.gutzeit-holzverbinder.de
Three-dimensional nailing plate (concealed beam
hangers)
2010-05-04
2014-05-29
Gutzeit Verbindungssysteme GmbH & Co.
Rudolf-Diesel-Strasse 1
D-58730 Fröndeberg, Industriegebiet
12 pages including 3 annexes which form an integral
part of the document

I LEGAL BASIS AND GENERAL
CONDITIONS
Page 2 of 12 of European Technical Approval no. ETA-09/0105
1 This European Technical Approval is issued by
ETA-Danmark A/S in accordance with:
- Council Directive 89/106/EEC of 21 December
1988 on the approximation of laws, regulations
and administrative provisions of Member States
relating to construction products 1) , as amended by
Council Directive 93/68/EEC of 22 July 1993 2) .
- Bekendtgørelse 559 af 27-06-1994 (afløser
bekendtgørelse 480 af 25-06-1991) om ikrafttræden
af EF direktiv af 21. december 1988 om
indbyrdes tilnærmelse af medlemsstaternes love
og administrative bestemmelser om byggevarer.
- Common Procedural Rules for Requesting,
Preparing and the Granting of European Technical
Approvals set out in the Annex to Commission
Decision 94/23/EC 3) .
- EOTA Guideline ETAG 015 Three-dimensional
nailing plates, September 2002 edition.
2 ETA-Danmark A/S is authorized to check whether
the provisions of this European Technical
Approval are met. Checking may take place in the
manufacturing plant. Nevertheless, the responsibility
for the conformity of the products to the
European Technical Approval and for their fitness
for the intended use remains with the holder of
the European Technical Approval.
3 This European Technical Approval is not to be
transferred to manufacturers or agents of manufacturers
other than those indicated on page 1, or
manufacturing plants other than those indicated
on page 1 of this European Technical Approval.
4 This European Technical Approval may be
withdrawn by ETA-Danmark A/S pursuant to
Article 5(1) of Council Directive89/106/EEC.
1) Official Journal of the European Communities N o L40, 11 Feb 1989, p 12.
2) Official Journal of the European Communities N o L220, 30 Aug 1993, p 1.
3) Official Journal of the European Communities N o L 17, 20 Jan 1994, p 34.
5 Reproduction of this European Technical Approval
including transmission by electronic means shall be
in full. However, partial reproduction can be made
with the written consent of ETA-Danmark A/S. In
this case partial reproduction has to be designated as
such. Texts and drawings of advertising brochures
shall not contradict or misuse the European Technical
Approval.
6 This European Technical Approval is issued by ETA-
Danmark A/S in English.
This version corresponds fully to the version circulated
within EOTA. Translations into other languages
have to be designated as such.

Page 3 of 12 of European Technical Approval no. ETA-09/0105
I SPECIAL CONDITIONS OF THE
EUROPEAN TECHNICAL APPROVAL
1 Definition of product and intended use
Definition of the product
Gutzeit concealed beam hangers are one-piece, face-fixed
concealed beam hangers to be used in timber to timber
connections.
The concealed beam hangers are made from pre-galvanized
steel Grade DX51D + Z (min Z275) according to EN
10327:2004 with a minimum Re of 295 MPa, a maximum
tensile strength Rm of 360 MPa and a minimum ultimate
strain A80 of 22 % with tolerances according to EN
10143:1993. Dimensions, hole positions, steel type and
typical installations are shown in Annex A.
Intended use
The concealed beam hangers are intended for use in making
end-grain to side-grain connections in load bearing timber
structures, as a connection between a wood based joist and a
solid timber or wood based header, where requirements for
mechanical resistance and stability and safety in use in the
sense of the Essential Requirements 1 and 4 of Council
Directive 89/106/EEC shall be fulfilled.
The concealed beam hangers can be installed as
connections between wood based members such as:
• Structural solid timber classified to C14-C40
according to EN 338 / EN 14081,
• Glulam classified to GL24-GL36 according to
EN 1194 / EN 14080,
• LVL according to EN 14374,
• Parallam PSL,
• Intrallam LSL,
• Duo- and Triobalken,
• Layered wood plates,
• Kreuzbalken,
• I-beams with backer blocks on both sides of the web
in the header and web stiffeners in the joist,
• Plywood according to EN 636.
However, the calculation methods are only allowed for a
characteristic wood density of up to 460 kg/m 3 . Even
though the wood based material may have a larger density,
this must not be used in the formulas for the load-carrying
capacities of the fasteners.
Annex B states the formulas for the characteristic loadcarrying
capacities of the connections with concealed beam
hangers. The design of the connections shall be in
accordance with Eurocode 5 or a similar national Timber
Code.
It is assumed that the forces acting on the concealed beam
hanger connection are Fup or Fdown perpendicular to the
header axis. The forces Fup and Fdown shall act in the
symmetry plane of the concealed beam hanger. It is
assumed that the forces are acting with an eccentricity e
with regard to side grain surface of the header.
It is assumed that the header beam is prevented from
rotating. If the header beam only has installed a concealed
beam hanger on one side the eccentricity moment
M = F ⋅ (B / 2 + 40mm) shall be considered. The same
v d H
applies when the header has concealed beam hanger
connections on both sides, but with vertical forces which
differ more than 20%.
The concealed beam hangers are intended for use for
connections subject to static or quasi static loading.
The zinc-coated hangers are for use in timber structures
subject to the dry, internal conditions defined by the service
classes 1 and 2 of EN 1995-1-1:2004, (Eurocode 5).
Assumed working life
The assumed intended working life of concealed beam
hangers for the intended use is 50 years, provided that they
are subject to appropriate use and maintenance.
The information on the working life should not be regarded
as a guarantee provided by the manufacturer or
ETA Danmark. An “assumed intended working life” means
that it is expected that, when this working life has elapsed,
the real working life may be, in normal use conditions,
considerably longer without major degradation affecting
the essential requirements.

Page 4 of 12 of European Technical Approval no. ETA-09/0105
2 Characteristics of product and assessment
ETAG
paragraph
6.1.1
6.1.2
6.1.3
6.2.1
6.3.1
6.7.1
6.7.2
6.7.3
Characteristic
2.1 Mechanical resistance and stability*)
Characteristic load-carrying capacity
Stiffness
Ductility in cyclic testing
2.2 Safety in case of fire
Reaction to fire
2.3 Hygiene, health and the environment
Influence on air quality
2.4 Safety in use
2.5 Protection against noise
2.6 Energy economy and heat retention
2.7 Related aspects of serviceability
Durability
Serviceability
Identification
Assessment of characteristic
See Annex B
No performance determined
No performance determined
The concealed beam hangers are made from
steel classified as Euroclass A1 in accordance
with EN 1350-1 and EC decision 96/603/EC,
amended by EC Decision 2000/605/EC
No dangerous materials **)
Not relevant
Not relevant
Not relevant
The concealed beam hangers have been assessed
as having satisfactory durability and
serviceability when used in timber structures
using the timber species described in Eurocode 5
and subject to the conditions defined by service
class 1 and 2
See Annex A
*) See page 5 of this ETA
**) In accordance with http://europa.eu.int-/comm/enterprise/construction/internal/dangsub/dangmain.htm In addition to the specific clauses relating to dangerous
substances contained in this European Technical Approval, there may be other requirements applicable to the products falling within its scope (e.g. transposed European
legislation and national laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Products Directive, these requirements need
also to be complied with, when and where they apply.

Safety principles and partial factors
2.1 Mechanical resistance and stability
Page 5 of 12 of European Technical Approval no. ETA-09/0105
See annex B for characteristic load-carrying capacities of
the concealed beam hangers.
The characteristic capacities of the concealed beam hangers
are determined by calculation assisted by testing as
described in the EOTA Guideline 015 clause 5.1.2. They
should be used for designs in accordance with Eurocode 5
or a similar national Timber Code.
The design models allow the use of fasteners described in
the table on page 10 in Annex A:
Threaded nails (ringed shank nails) in accordance to
EN 14592
In the formulas in Annex B the capacities for threaded
nails calculated from the formulas of Eurocode 5 are
used assuming a thick steel plate when calculating the
lateral nail load-carrying-capacity.
The load bearing capacities of the brackets has been
determined based on the use of connector nails 4,0 x 40
mm in accordance with the German national approval for
the nails.
The characteristic withdrawal capacity of the nails has to be
determined by calculation in accordance with EN 1995-1-
1: 2004, paragraph 8.3.2 (head pull-through is not
relevant):
Fax,Rk = fax,k × d × tpen
Where:
fax,k Characteristic value of the withdrawal parameter in
N/mm 2
d Nail diameter in mm
Penetration depth of the profiles in mm
tpen
Based on tests by Versuchsanstalt für Stahl, Holz und
Steine, University of Kalrsruhe, the characteristic value of
the withdrawal resistance for the threaded nails used can be
calculated as:
fax,k = 50 × 10 -6 × σk 2
Where:
σk
Characteristic density of the timber in kg/m 3
The shape of the nail directly under the head shall be in the
form of a truncated cone with a diameter under the nail
head which exceeds the hole diameter.
No performance has been determined in relation to ductility
of a joint under cyclic testing. The contribution to the
performance of structures in seismic zones, therefore, has
not been assessed.
No performance has been determined in relation to the
joint’s stiffness properties - to be used for the analysis of
the serviceability limit state.
2.7 Related aspects of serviceability
2.7.1 Corrosion protection in service class 1 and 2.
In accordance with ETAG 015 the zinc- coated concealed
beam hangers have a zinc coating weight of min Z275. The
steel employed is DX51D with min Z275 according to EN
10327:2004.

3 Attestation of Conformity and
CE marking
3.1 Attestation of Conformity system
Page 6 of 12 of European Technical Approval no. ETA-09/0105
The system of attestation of conformity is 2+
described in Council Directive 89/106/EEC
(Construction Products Directive) Annex III.
a) Tasks for the manufacturer:
(1) Factory production control,
(2) Initial type testing of the product,
b) Tasks for the notified body:
3.2 Responsibilities
(1) Initial inspection of the factory and the
factory production control,
(2) Continuous surveillance
3.2.1 Tasks of the manufacturer
3.2.1.1 Factory production control
The manufacturer has a factory production control
system in the plant and exercises permanent internal
control of production. All the elements, requirements
and provisions adopted by the manufacturer are
documented in a systematic manner in the form of
written policies and procedures. This production
control system ensures that the product is in
conformity with the European Technical Approval.
The manufacturer shall only use raw materials
supplied with the relevant inspection documents as
laid down in the control plan 4 . The incoming raw
materials shall be subject to controls and tests by the
manufacturer before acceptance. Check of materials,
such as sheet metal, shall include control of the
inspection documents presented by suppliers
(comparison with nominal values) by verifying
dimension and determining material properties, e.g.
chemical composition, mechanical properties and
zinc coating thickness.
The manufactured components are checked visually
and for dimensions.
The control plan, which is part of the technical
documentation of this European Technical Approval,
4 The control plan has been deposited at ETA-Danmark and is
only made available to the approved bodies involved in the
conformity attestation procedure.
includes details of the extent, nature and frequency of
testing and controls to be performed within the
factory production control and has been agreed
between the approval holder and ETA Danmark.
The results of factory production control are recorded
and evaluated. The records include at least the
following information:
- Designation of the product, basic material and
components;
- Type of control or testing;
- Date of manufacture of the product and date of
testing of the product or basic material and
components;
- Result of control and testing and, if appropriate,
comparison with requirements;
- Signature of person responsible for factory
production control.
The records shall be presented to ETA Danmark on
request.
3.2.1.1 Initial type testing of the product
For initial type-testing the results of the tests
performed as part of the assessment for the European
Technical Approval shall be used unless there are
changes in the production line or plant. In such cases
the necessary initial type testing has to be agreed
between ETA Danmark and the notified body.
3.2.2. Tasks of notified bodies
3.2.2.1 Initial inspection of the factory and the factory
production control
The approved body should ascertain that, in
accordance with the control plan, the factory, in
particular the staff and equipment, and the factory
production control, are suitable to ensure a
continuous and orderly manufacturing of the angle
brackets with the specifications given in part 2.
3.2.2.2 Continuous surveillance
The approved body shall visit the factory at least
twice a year for routine inspections. It shall be
verified that the system of factory production control
and the specified manufacturing processes are
maintained, taking account of the control plan.
The results of product certification and continuous
surveillance shall be made available on demand by
the certification body to ETA Danmark. Where the
provisions of the European Technical Approval and
the control plan are no longer fulfilled, the certificate

Page 7 of 12 of European Technical Approval no. ETA-09/0105
of conformity shall be withdrawn by the approved
body.
3.3 CE marking
The CE marking shall be affixed on each packaging
of angle brackets. The initials "CE" shall be followed
by the identification number of the notified body and
shall be accompanied by the following information:
- Name or identifying mark of the
manufacturer
- The last two digits of the year in which the
marking was affixed
- Number of the European Technical
Approval
- Name and size of product
- Number of the ETA Guideline
(ETAG no. 015)
- Number of the EC Certificate of
Conformity

Page 8 of 12 of European Technical Approval no. ETA-09/0105
4 Assumptions under which the fitness of the
product for the intended use was favourably
assessed
4.1 Manufacturing
Gutzeit concealed beam hangers are manufactured in
accordance with the provisions of this European Technical
Approval using the manufacturing processes as identified
in the inspection of the plant by the notified inspection
body and laid down in the technical documentation.
4.2 Installation
Concealed beam hanger connections
A concealed beam hanger connection is deemed fit for its
intended use provided:
Header – support conditions
• The header beam shall be restrained against rotation
and be free from wane under the concealed beam
hanger.
If the header carries joists only on one side the
eccentricity moment from the joists Mec = Rjoist
(bheader/2+40mm) shall be considered at the strength
verification of the header.
Rjoist Reaction force from the joists
Width of header
bheader
• For a header with joists from both sides but with
different reaction forces a similar consideration
applies.
Wood to wood connections
• Concealed beam hangers are fastened to wood-based
members by nails.
• There shall be nails in all holes or a partial nailing
pattern as prescribed in Annex A-C may be used.
• The characteristic capacity of the concealed beam
hanger connection is calculated according to the
manufacturer’s technical documentation, dated 2008-
12-15.
• The concealed beam hanger connection is designed
in accordance with Eurocode 5 or an appropriate
national code.
• The gap between the end of the joist and the surface,
where contact stresses can occur during loading shall
be limited. This means that for concealed beam
hangers the gap between the surface of the nail heads
in the flaps and the end of the joist shall be
maximum 8 mm.
• The cross section of the header shall have a plane
surface against the whole concealed beam hanger.
• The depth of the joist shall be so large that the top
(bottom) of the joist is at least a4,t above (below) the
upper (lower) dowel in the joist.
• Nails to be used shall have a diameter, which fits the
holes of the concealed beam hangers.
4.3 Maintenance and repair
Maintenance is not required during the assumed intended
working life. Should repair prove necessary, it is normal to
replace the concealed beam hanger.
Thomas Bruun
Manager, ETA-Danmark

Page 9 of 12 of European Technical Approval no. ETA-09/0105
Annex A
Product details and definitions
Concealed beam hanger
Face mount hanger with flanges. 3.0 mm thick pre-galvanized steel DX51D + Z (min Z275) according
to EN 10327:2004 with a minimum Re of 295 MPa, a maximum tensile strength Rm of 360 MPa and a
minimum ultimate strain A80 of 22 % with tolerances according to EN 10143:1993.
Drawing: beam hanger 90 (left), beam hanger 160 (right)
Beam
hanger
N° of nail
holes
N° d
N° of Bolt
holes
N° d
90 8 5 4 8,5
120 10 5 3 13
160 14 5 4 13
200 18 5 5 13
240 22 5 6 13

Page 10 of 12 of European Technical Approval no. ETA-09/0105
Fastener types and sizes
NAIL diameter Length Nail type
4.0 40 Ringed shank nails according to EN 14592
In the formulas in Annex B the capacities for threaded nails calculated from the formulas of Eurocode 5 are used
assuming a thick steel plate when calculating the lateral nail load-carrying-capacity. The load bearing capacities of
the concealed beam hangers has been determined based on the use of connector nails 4,0 x L mm in accordance
with the German national approval for the nails. The characteristic withdrawal capacity of the nails has to be
determined by calculation in accordance with EN 1995-1-1: 2004, paragraph 8.3.2 (head pull-through is not
relevant):
Fax,Rk = f1,k × d × tpen
Where:
f1,k Characteristic value of the withdrawal parameter in N/mm 2
d Nail diameter in mm
Penetration depth of the profiled shank in mm
tpen
Based on tests by Versuchsanstalt für Stahl, Holz und Steine, University of Karlsruhe, the characteristic value of the
withdrawal resistance for the threaded nails used can be calculated as:
f1,k = 50 × 10 -6 × ρk 2
Where:
ρk Characteristic density of the timber in kg/m 3
The shape of the nail directly under the head shall be in the form of a truncated cone with a diameter under the nail
head which exceeds the hole diameter.
DOWELS
diameter
8.0
12.0
Correspondence hole diameter in steel
plate
Max. 0.5 mm. larger than the dowel
diameter
Max. 1 mm. larger than the dowel
diameter
Dowels type
dowels according to EN 14592
dowels according to EN 14592

Page 11 of 12 of European Technical Approval no. ETA-09/0105
Annex B
Characteristic values of load-carrying-capacities
The downward and the upward directed forces are assumed to act in the middle of the joist.
Only a full nailing pattern is specified, where there are nails in all the holes of the header connection. Also dowels are
placed in all the dowel holes in the joist.
B.1 Concealed beam hangers fastened with nails and dowels
nJ,ef
nH
⎧n
J,ef ⋅ Fv,J,Rd
⎪
⎪
1
F Z,Rd = min ⎨
⎪ ⎛ 1 ⎞ ⎛ 1 ⎞
⎪ ⎜ +
⎜
⎟ ⎜ ⎟
n H ⋅ F ⎟ ⎜
v,H,Rd k H ⋅ F ⎟
⎩ ⎝ ⎠ ⎝ ax,H,Rd ⎠
2 2
effective number of dowels in the joist, see Table B.1
total number of nails in the side of the header
(B.1)
Fv,J,Rd Characteristic lateral load-carrying capacity of a dowel with two shear planes in the joist
Fv,J,Rd Characteristic lateral load-carrying capacity of a nail in single shear in the header assuming a thick steel plate
Fax,H,Rd Characteristic axial load-carrying capacity of a nail in the header
kH
form factor, see Table B.1
Table B.1: Gutzeit concealed beam hangers: Form factors kH and effective number of dowels nJ,ef
Beam hanger nJ nH
kH nJ,ef
Loading DOWN
kH nJ,ef
Loading UP
90 4 8 5,00 0,85 6,67 1,12
120 3 10 23,3 1,03 11,7 0,66
160 4 14 45,1 1,66 22,6 1,26
200 5 18 74,0 2,40 37,0 2,00
240 6 22 110 3,22 55,0 2,84

Page 12 of 12 of European Technical Approval no. ETA-09/0105
Annex C
Installation of concealed beam hangers